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Home/Honda/Pilot/Honda Pilot II (2008-2011)/Repair manual/Testing & Diagnostics/DTC P0563: PCM Power Source Circuit Unexpected Voltage
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DTC P0563: PCM Power Source Circuit Unexpected Voltage Honda Pilot II

Testing & Diagnostics 6 illustrations ~563 words

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .

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Scheme 187: DTC P0563: PCM Power Source Circuit Unexpected Voltage
Scheme 187: DTC P0563: PCM Power Source Circuit Unexpected Voltage

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  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch to LOCK (0).
  4. Wait 10 seconds.
  5. Turn the ignition switch to ON (II).
  6. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0563 indicated? YES - Go to step 7 . NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at PGM-FI main relay 1 and the PCM.
  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect PCM connector A (49P).
  10. Measure the voltage between PCM connector terminal A6 and body ground. Is there battery voltage? YES - Go to step 13 . NO - Go to step 11 .
  11. Remove PGM-FI main relay 1 (C) from the under-hood fuse/relay box.
  12. Check for continuity between PCM connector terminal A6 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (A6) and PGM-FI main relay 1, then go to step 19 . NO - Go to step 18 .
  13. Reconnect PCM connector A (49P).
  14. Disconnect PCM connector B (49P).
  15. Measure the voltage between PCM connector terminal B3 and body ground. Is there battery voltage? YES - Go to step 16 . NO - Go to step 26 .
  16. Remove PGM-FI main relay 1 (C) from the under-hood fuse/relay box.
  17. Measure the voltage between PCM connector terminal B3 and body ground. Is there battery voltage? YES - Repair short to power in the wire between the PCM (B3) and PGM-FI main relay 1, then go to step 19 . NO - Go to step 18 .
  18. Test PGM-FI main relay 1 (see «POWER RELAY TEST»(ref-333609-S14631099402009072100000) ). Is the relay OK? YES - Go to step 26 . NO - Replace PGM-FI main relay 1, then Go to step 19 .
  19. Reconnect all connectors.
  20. Turn the ignition switch to ON (II).
  21. Reset the PCM with the HDS.
  22. Turn the ignition switch to LOCK (0).
  23. Wait 10 seconds.
  24. Do «PCM IDLE LEARN PROCEDURE»(ref-333561-S36442749152009072100000) .
  25. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0563 indicated? YES - Check for poor connections or loose terminals at PGM-FI main relay 1 and the PCM, then go to step 1 . NO - Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  26. Turn the ignition switch to LOCK (0).
  27. Reconnect all connectors.
  28. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-333558-S24141467512009072100000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-333557-S35070474232009072100000) ).
  29. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0563 Indicated? YES - Check for poor connections or loose terminals at PGM-FI main relay 1 and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-333557-S35070474232009072100000) ), then recheck. If the PCM was substituted, go to step 1 . NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-333558-S09775742392009072100000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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